mirror of https://github.com/status-im/evmc.git
81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/* EVMC: Ethereum Client-VM Connector API.
|
|
* Copyright 2016-2019 The EVMC Authors.
|
|
* Licensed under the Apache License, Version 2.0.
|
|
*/
|
|
|
|
#include "example_host.h"
|
|
#ifdef STATICALLY_LINKED_EXAMPLE
|
|
#include "example_vm/example_vm.h"
|
|
#endif
|
|
|
|
#include <evmc/helpers.h>
|
|
#include <evmc/loader.h>
|
|
|
|
#include <inttypes.h>
|
|
#include <stdio.h>
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
#ifdef STATICALLY_LINKED_EXAMPLE
|
|
(void)argc;
|
|
(void)argv;
|
|
struct evmc_instance* vm = evmc_create_example_vm();
|
|
if (!vm)
|
|
return EVMC_LOADER_INSTANCE_CREATION_FAILURE;
|
|
if (!evmc_is_abi_compatible(vm))
|
|
return EVMC_LOADER_ABI_VERSION_MISMATCH;
|
|
#else
|
|
const char* config_string = (argc > 1) ? argv[1] : "example-vm.so";
|
|
enum evmc_loader_error_code error_code;
|
|
struct evmc_instance* vm = evmc_load_and_configure(config_string, &error_code);
|
|
if (!vm)
|
|
{
|
|
printf("Loading error: %d\n", error_code);
|
|
// NOTE: the values are small enough for casting
|
|
return (int)error_code;
|
|
}
|
|
#endif
|
|
|
|
// EVM bytecode goes here. This is one of the examples.
|
|
const uint8_t code[] = "\x30\x60\x00\x52\x59\x60\x00\xf3";
|
|
const size_t code_size = sizeof(code) - 1;
|
|
const uint8_t input[] = "Hello World!";
|
|
const evmc_uint256be value = {{1, 0}};
|
|
const evmc_address addr = {{0, 1, 2}};
|
|
const int64_t gas = 200000;
|
|
struct evmc_tx_context tx_context;
|
|
memset(&tx_context, 0, sizeof(tx_context));
|
|
struct evmc_context* ctx = example_host_create_context(tx_context);
|
|
struct evmc_message msg;
|
|
msg.sender = addr;
|
|
msg.destination = addr;
|
|
msg.value = value;
|
|
msg.input_data = input;
|
|
msg.input_size = sizeof(input);
|
|
msg.gas = gas;
|
|
msg.depth = 0;
|
|
struct evmc_result result = evmc_execute(vm, ctx, EVMC_HOMESTEAD, &msg, code, code_size);
|
|
printf("Execution result:\n");
|
|
int exit_code = 0;
|
|
if (result.status_code != EVMC_SUCCESS)
|
|
{
|
|
printf(" EVM execution failure: %d\n", result.status_code);
|
|
exit_code = result.status_code;
|
|
}
|
|
else
|
|
{
|
|
printf(" Gas used: %" PRId64 "\n", gas - result.gas_left);
|
|
printf(" Gas left: %" PRId64 "\n", result.gas_left);
|
|
printf(" Output size: %zd\n", result.output_size);
|
|
printf(" Output: ");
|
|
size_t i = 0;
|
|
for (i = 0; i < result.output_size; i++)
|
|
printf("%02x", result.output_data[i]);
|
|
printf("\n");
|
|
}
|
|
evmc_release_result(&result);
|
|
example_host_destroy_context(ctx);
|
|
evmc_destroy(vm);
|
|
return exit_code;
|
|
}
|